\begin{{tabular}}{{l p{{2mm}} l l l}}
    \toprule
        &
        & (1)
        & (2)
        & (3)
    \\
        &
        & \multicolumn{{1}}{{l}}{{Price/day}}
        & \multicolumn{{1}}{{l}}{{Price/day}}
        & \multicolumn{{1}}{{l}}{{Price/day}}
    \\
    \cmidrule{{1-1}} \cmidrule{{3-5}}
        $\Delta$ synergies in boom: complex wells/high-spec rigs
        &
        & {delta_0}
        & {delta_1}
        & {delta_2}
    \\
        &
        & ({se_delta_0})
        & ({se_delta_1})
        & ({se_delta_2})
    \\
    \midrule
       Project controls
        &
        & No
        & Yes
        & Yes
    \\
        Contract-type controls
        &
        & No
        & No
        & Yes
    \\
    \midrule
        N
        &
        & {n_0}
        & {n_1}
        & {n_2}
    \\
    \bottomrule
\end{{tabular}}

\fnote{{Note: * p < 0.1, ** p < 0.05, *** p < 0.01. This regression reports the estimated $\beta_{{3,high}}$ from the equation: $price_{{ijt}} = \beta_{{0, y_j}} + \beta_{{1, y_j}} 1[\text{{High-complexity}}_i] + \beta_{{2, y_j}} g_t + \beta_{{3, low}} 1[\text{{High-complexity}}_i] g_t + \beta_{{3, y_j}} 1[y_j \in \{{\text{{mid}}, \text{{high}}\}}] 1[\text{{High-complexity}}_i] g_t  + \epsilon_{{ijt}}$. (The component $\beta_{{3,low}}$ is included in all regressions, while if $y_j\in \{{mid,high\}}$ then the components  $\beta_{{3,mid}}$ and $\beta_{{3,high}}$ are additionally included.) Prices are in thousands of USD per day. The $\Delta$ synergies in boom term corresponds to $\beta_{{3,high}}$ i.e. the change in a price per day for a `well-matched` high-specification rig for a \$1 increase in the natural gas price. Project controls indicates a control for the value of hydrocarbons (i.e. the quantity of hydrocarbons multiplied by the current natural gas price). Contract-type controls corresponds to controls for contract duration and also whether the contract is an extension or not. Robust standard errors are in brackets.}}
